Date: Fri, 23 Sep 2005 04:06:03 -0500 From: Tyler T <espartano.list@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Problen with a little C program Message-ID: <9385b1fc05092302062e1cb50d@mail.gmail.com> In-Reply-To: <9385b1fc0509230142733b4f94@mail.gmail.com> References: <9385b1fc0509230142733b4f94@mail.gmail.com>
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2005/9/23, Tyler T <espartano.list@gmail.com>:
> hi list, firts sorry for my english.
>
> for hobbye i am trying to write a little program in C lenguage, the
> program create a ip header and show the values of ip header whitout
> send any data, only create the header, the program is this:
>
> //////BEGIN////////
> #include <stdio.h>
> #include <stdlib.h>
> #include <unistd.h>
> #include <netinet/in.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <netinet/ip.h>
> #include <netinet/tcp.h>
> #include <sys/time.h>
> #include <arpa/inet.h>
>
> #include <netdb.h>
>
> struct ip *create_iph(char *ips, char *ipd, int sec);
> void show_iph(struct ip *iph);
>
> int main(){
>
> struct ip *iph;
>
> iph =3D create_iph("127.0.0.1","127.0.0.1",10);
> showiph(iph);
>
> free(iph);
>
> iph=3DNULL;
>
> return 0;
>
> }
>
> struct ip *create_iph(char *ips, char *ipd, int sec){
>
> struct ip *iph;
>
> iph =3D malloc(sizeof(struct ip));
>
> iph->ip_v =3D 4;
> iph->ip_hl =3D 5;
> iph->ip_tos =3D 0;
> iph->ip_len =3D sizeof(struct ip) + sizeof(struct tcphdr);
> iph->ip_id =3D htons(sec); //cambiar el id por el numero de port =
a scanear
> iph->ip_ttl =3D 255;
> iph->ip_p =3D 6;
> iph->ip_sum =3D 0; //checksum
> iph->ip_src.s_addr =3D inet_addr(ips);
> iph->ip_dst.s_addr =3D inet_addr(ipd);
>
> return iph;
> }
>
> void show_iph(struct ip *iph){
>
> printf("version %d\n",iph->ip_v);
> printf("header leng (ihl) %d\n",iph->ip_hl);
> printf("total leng %d\n",iph->ip_len);
> printf("identification %d\n",iph->ip_id);
> printf("TTL %d\n",iph->ip_ttl);
> printf("protocol %d\n",iph->ip_p);
> printf("checksum %d\n",iph->ip_sum);
> printf("type of service (TOS) %d\n",iph->ip_tos);
> printf("ip source %s\n",inet_ntoa(iph->ip_src));
> printf("ip destination %s\n",inet_ntoa(iph->ip_dst));
>
> }
> ////////END///////
>
> when i execute: "gcc -o sock_raw sock_raw.c" i obtain:
>
> -bash-2.05b$ gcc -o sock_raw sock_raw.c
> In file included from sock_raw.c:7:
> /usr/include/netinet/ip.h:160: error: syntax error before "n_long"
> /usr/include/netinet/ip.h:163: error: syntax error before "n_long"
> -bash-2.05b$
>
>
> my system is: FreeBSD 5.4 STABLE
> and my gcc version is: gcc version 3.4.2 [FreeBSD] 20040728
>
> thanks in advance.
>
sorry, i have the solution: It was necessary to include the library
<netinet/in_systm.h>
thanks for all.
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